An illustrated key to the cuckoo wasps (Hymenoptera, Chrysididae) of the Nordic and Baltic countries, with description of a new species Author Paukkunen, Juho Author Berg, Alexander Author Soon, Villu Author Odegaard, Frode Author Rosa, Paolo text ZooKeys 2015 548 1 116 http://dx.doi.org/10.3897/zookeys.548.6164 journal article http://dx.doi.org/10.3897/zookeys.548.6164 1313-2970-548-1 D5D7B51E5AC6460D9B3C7584E46F9B3F Taxon classification Animalia Hymenoptera Chrysididae Hedychridium purpurascens (Dahlbom, 1854) Figs 70, 72, 73 Hedychrum purpurascens Dahlbom, 1854: 85. Hedychridium purpurascens : du Buysson (in Andre ) 1892: 208. Diagnosis. Length 5-6 mm. The species closely resembles Hedychridium cupreum , but the colouration of the head and mesosoma are dorsally darker violet (Fig. 70), sometimes nearly black. The punctation of the mesoscutum and mesoscutellum is denser (Fig. 70), the pubescence of the metasoma shorter (Fig. 72) and the fine cross-ridging of the scapal basin is restricted to a smaller area medially. S2 has a round metallic spot medially (Fig. 73). Distribution. Estonia. Very rare. Nine specimens were collected in 2013 from Kauksi, northern shore of Lake Peipus. No other records are known from the Nordic and Baltic countries. - West Palearctic: central Europe ( Linsenmaier 1959 ). Biology. Habitat: sparsely vegetated sandy areas. Adults often sit on roots of trees and bask in the sun ( Trautmann 1927 ). Flight period: July to August. Host: unknown.